astronomy

Hans Schjellerup

Hans Schjellerup is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Hans Schjellerup rather than just read about it. In short: Hans Carl Frederik Christian Schjellerup (8 February 1827 – 13 November 1887) was a Danish astronomer. He was born at Odense, the son of a jeweller.

Key takeaways

Hans Schjellerup belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Hans Schjellerup to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Hans Schjellerup from memory before moving on to harder problems.

Reference excerpt

Hans Carl Frederik Christian Schjellerup (8 February 1827 – 13 November 1887) was a Danish astronomer. He was born at Odense, the son of a jeweller. Initially he was apprenticed as a watch maker, but in 1848 he passed the entrance exam for the Polytechnic School of Copenhagen. He graduated by passing an examination in applied mathematics and mechanics. In 1851 he became an observer at the University Observatory in Copenhagen. He soon became an instructor at the Polytechnic School, then in 1854 a Professor of Mathematics at the Denmark Naval Academy. In 1866, after the new observatory had been completed, Schjellerup assembled a catalog of red stars. He also began a study of Arabic, Chinese and other oriental languages, and used his knowledge to study old astronomic records, including those of ʿAbd al-Raḥmān al-Ṣūfī (whose Book of Fixed Stars he translated into French in 1874) and Chinese records of eclipses. In 1869, he drafted a proposal for a Chinese telegraph dictionary, with each of 5,454 characters being assigned a number. He became an associate of the British Royal Astronomical Society in 1879. At the University of Copenhagen he became director of the observatory, serving in that capacity up until his death, following a lengthy illness. The crater Schjellerup on the Moon is named after him.

References J. E. L. D. (1887). "Obituary". Monthly Notices of the Royal Astronomical Society. 48 (4): 171–174. Bibcode:1888MNRAS..48..171.. doi:10.1093/mnras/48.4.171. Bramsen, Christopher Bo (2001). Open Doors: Vilhelm Meyer and the establishment of General Electric in China. Routledge. p. 22. ISBN 0-7007-1404-9.

Illustrations

Worked examples

Example 1 — a first encounter with Hans Schjellerup

Start with the simplest possible case. Write down what Hans Schjellerup claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Hans Schjellerup before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Hans Schjellerup ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Hans Schjellerup

In research: Hans Schjellerup appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Hans Schjellerup in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Hans Schjellerup is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1827 births, 1887 deaths, 19th-century Danish astronomers, so understanding it makes those chapters shorter.
In everyday life: Look for Hans Schjellerup outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Hans Schjellerup in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Hans Schjellerup means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Hans Schjellerup out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hans Schjellerup in simple terms?

Hans Carl Frederik Christian Schjellerup (8 February 1827 – 13 November 1887) was a Danish astronomer. He was born at Odense, the son of a jeweller.

Why does Hans Schjellerup matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Hans Schjellerup?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Hans Schjellerup.